I need advice on adoption...?

My mom is adopting a newborn and I don't know how to deal with my resentment. I know the baby didn't do anything wrong, but I can't help feeling saddened that she didn't even consider asking her children our opinion. My mom couldn't care less about our daily lives because she's been so consumed with the adoption process. I just wish she wanted to take care of us as much as she does the baby. I've prayed about it but can't seem to let go of the bitterness.